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TagFS — Tag Semantics for Hierarchical File Systems

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Max Völkel
Max Völkel

Finally a file can be on more than one folder! End of the tyranny of the hierarchy. The talk describes the design and implementation of a tag-based file system. Presented at IKNOW 2006.

TechnologyEducation
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TagFS — Tag Semantics for Hierarchical File Systems Bonus Track: Introducing SemFS 2006 2006 Web3.0 2006 Stephan Bloehdorn Institute AIFB, University of Karlsruhe, Germany Olaf Görlitz ISWeb, University of Koblenz-Landau, Germany Simon Schenk ISWeb, University of Koblenz-Landau, Germany Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany talk Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany
Motivation ,[object Object],[object Object],[object Object],[object Object]
Hierarchical file systems have some problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tagging ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],new Web2.0
Example: del.icio.us Tagging Browsing Queries
Comparison ,[object Object],[object Object],a b a+b+c a+c b+c a+b c a b c /a /a/b /a/c /a /a/b /a/b/c /a/c /a/c/b /c /c/b /c/b/a /c/a /c/a/b /b /b/a /b/a/c /b/c /b/c/a
Mapping file system semantics to tagging semantics Query and Browse – the easy parts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mapping file system semantics to tagging semantics Tagging – the hard part ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tagging in the file system ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introducing SemFS ,[object Object],Web2.0 Web3.0 Semantic Desktop RDF keywords Bonus Track
What is a file system?
What is a file system? Organising files … An address given as path expression := Letter “ : “ ( “ “ name)* File System dir! response files folders name metadata metadata
What is a file system? … managing binary data File System metadata data 1011 write 1011 read 1011
What is a file system? … managing binary data File System rename metadata data
What is a file system? … managing binary data File System Add file or delete file metadata data
What is a file system? Organising files and managing binary data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is a virtual file system? Organising files and managing binary data op Virtual File System Looks and behaves like a file system… … but is no file system. It‘s implemen-ted differently. metadata data X Flickr CMS File System metadata data
What is a semantic file system? Organising files and managing binary data. op Semantic File System Flexible implementation. Unified metadata  unified search metadata data X Flickr CMS File System
Architecture of SemFS: Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architecture of SemFS: Example for Filters ,[object Object],[object Object],[object Object],[object Object],Main Artist Favourite y Musicatboy Slimavourite atboy Slimavourite avourite
Architecture of SemFS: Example for Filters ,[object Object],[object Object],[object Object],[object Object],Main Artist Favourite y Musicatboy Slimavourite atboy Slimavourite avourite ,[object Object],[object Object],[object Object],[object Object]
Architecture of SemFS: Class-Handlers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architecture of SemFS: Summary: Metadata Graph, Filters, Class-Handlers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Using SemFS: A tagging file system (TagFS) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Download Prototype at http://isweb.uni-koblenz.de/Research (Linux only, WebDAV/Windows in progress) Thank you. Questions?
BACKUP
Contact Information ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architecture
Tagging Ontology

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TagFS — Tag Semantics for Hierarchical File Systems

  • 1. TagFS — Tag Semantics for Hierarchical File Systems Bonus Track: Introducing SemFS 2006 2006 Web3.0 2006 Stephan Bloehdorn Institute AIFB, University of Karlsruhe, Germany Olaf Görlitz ISWeb, University of Koblenz-Landau, Germany Simon Schenk ISWeb, University of Koblenz-Landau, Germany Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany talk Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany
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  • 5. Example: del.icio.us Tagging Browsing Queries
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  • 11. What is a file system?
  • 12. What is a file system? Organising files … An address given as path expression := Letter “ : “ ( “ “ name)* File System dir! response files folders name metadata metadata
  • 13. What is a file system? … managing binary data File System metadata data 1011 write 1011 read 1011
  • 14. What is a file system? … managing binary data File System rename metadata data
  • 15. What is a file system? … managing binary data File System Add file or delete file metadata data
  • 16.
  • 17. What is a virtual file system? Organising files and managing binary data op Virtual File System Looks and behaves like a file system… … but is no file system. It‘s implemen-ted differently. metadata data X Flickr CMS File System metadata data
  • 18. What is a semantic file system? Organising files and managing binary data. op Semantic File System Flexible implementation. Unified metadata  unified search metadata data X Flickr CMS File System
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